#include <iostream>

using namespace std;

// 模板1：交换基本类型的值

template<typename T>

void swap(T &a, T &b);

//模板2：交换两个数组

template<typename T, unsigned N>

void swap(T (&a)[N], T(&b)[N]);

//模板3：打印数组元素

template<typename T, unsigned N>

void printArray(T (&arr)[N]);

int main() {

    int m = , n = ;

    swap(m,n);

    cout<<m<<", "<<n<<endl;

    // 交换两个数组

    int a[] = {,,,,};

    int b[] = {,,,,};

    swap(a,b); // 匹配模板2

    // 打印数组

    printArray(a);

    printArray(b);

    return ;

}

template<typename T>

void swap(T &a, T &b) {

    T tmp = a;

    a = b;

    b = tmp;

}

template<typename T, unsigned N>

void swap(T (&a)[N], T(&b)[N]) {

    T tmp;

    for (int i= ; i<N;i++) {

        tmp = a[i];

        a[i] = b[i];

        b[i] = tmp;

    }

}

template<typename T, unsigned N>

void printArray(T (&arr)[N]) {

    for (int i = ;i<N;i++) {

        if (i == N - ) {

            cout<<arr[i]<<endl;

        } else {

            cout<<arr[i]<<", ";

        }

    }

}